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Stockholders' Equity - Additional Information (Detail) - USD ($)
 1 Months Ended 2 Months Ended 12 Months Ended
Oct. 15, 2015
Oct. 14, 2015
Mar. 30, 2017
Dec. 21, 2016
Mar. 30, 2016
Feb. 15, 2016
Jan. 31, 2016
Nov. 17, 2015
Oct. 18, 2012
Feb. 29, 2016
Mar. 31, 2017
Mar. 31, 2016
Dec. 15, 2015
Apr. 29, 2013
Stockholders Equity Note [Line Items]                            
Common Stock, shares authorized                     100,000,000 100,000,000    
Exercise price                     $ 10.00      
Expected term         5 years             6 years    
Expected volatility rate         65.80%             133.00%    
Risk free interest rate         1.20%                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 1,111,111       555,555                  
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 9.00 $ 9.00     $ 10.00           $ 1.1485      
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross                   374,150 149,200 0    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition                     1 year 6 months 11 days      
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price                     $ 4.78 $ 5.97    
Stock Issued During Period, Value, New Issues                       $ 4,999,995    
Debt Conversion, Converted Instrument, Shares Issued     499,000                      
Interest Rate of From Notice of Redemption                     10.00%      
Preferred Stock, Redemption Amount   $ 60,000,000                 $ 60,000,000      
Warrant Expiration Term 5 years       5 years                  
Noncash Or Part Noncash Valuations of Warrant Liability Issued                     2,922,222      
Temporary Equity, Carrying Amount, Attributable to Parent       $ 7,077,778                    
Proceeds from Warrant Exercises                     172,000      
Reclassification Of Derivative Liability To Equity       $ 1,177,778             $ 1,177,778 0    
Debt Instrument, Convertible, Conversion Price     $ 10.00                      
Stock Issued During Period, Shares, Exercise of Warrants                     150,000      
Gain (Loss) on Extinguishment of Debt                     $ 0 $ (266,366)    
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares             275,000              
Cash Acquired from Acquisition             $ 1,512,500              
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned             $ 200,000              
Conversion Agreement [Member]                            
Stockholders Equity Note [Line Items]                            
Restricted shares granted to agent               275,000            
Stock Issued During Period, Shares, New Issues               275,000            
Shares Issued, Price Per Share               $ 10            
Rights to Purchase of Common Stock               300,000            
Interest Payable               $ 47,112            
Long-term Debt, Gross               $ 2,000,000            
Conversion Agreement [Member] | Anti Dilution Adjustments [Member]                            
Stockholders Equity Note [Line Items]                            
Restricted shares granted to agent               200,000            
Stock Issued During Period, Shares, New Issues               200,000            
Shares Issued, Price Per Share               $ 20            
NNA [Member]                            
Stockholders Equity Note [Line Items]                            
Share price               $ 6.00            
Debt Conversion, Converted Instrument, Shares Issued               600,000            
Debt Conversion, Converted Instrument, Amount               $ 3,060,000            
Debt Instrument, Convertible, Discount Percentage               15.00%            
Conversion Of Warrants And Convertible Note               $ 1,624,029            
Debt Instrument, Convertible, Conversion Price               $ 5.10            
Debt Instrument, Convertible, Terms of Conversion Feature               482,904            
Debt Conversion, Original Debt, Amount               $ 1,124,000            
Gains (Losses) on Restructuring of Debt               171,000            
Gain (Loss) on Extinguishment of Debt   $ 266,000           $ 266,000            
Southern California Heart Centers, A Medical Corporation [Member]                            
Stockholders Equity Note [Line Items]                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights                     9.00      
Proceeds from Issuance of Preferred Stock and Preference Stock                     $ 5,000,000      
Series A Preferred Stock [Member]                            
Stockholders Equity Note [Line Items]                            
Restricted shares granted to agent                       0    
Stock Issued During Period, Value, New Issues                       $ 0    
Preferred Stock, Redemption Amount                     10,000,000      
Stock Issued During Period, Shares, New Issues                       0    
Proceeds from Issuance of Preferred Stock, Preference Stock, and Warrants, Total                     $ 0 $ 10,000,000    
Stock Issued During Period, Shares, Exercise of Warrants                     0      
Series B Preferred Stock [Member]                            
Stockholders Equity Note [Line Items]                            
Restricted shares granted to agent         555,555             555,555    
Expected term                     5 years      
Expected volatility rate                     65.80%      
Risk free interest rate                     1.20%      
Class of Warrant or Right, Exercise Price of Warrants or Rights         $ 10.00                  
Stock Issued During Period, Value, New Issues         $ 4,999,995             $ 3,884,745    
Stock Issued During Period, Shares, New Issues         555,555             555,555    
Proceeds from Issuance of Preferred Stock, Preference Stock, and Warrants, Total         $ 3,884,745           $ 0 $ 4,999,995    
Stock Issued During Period, Shares, Exercise of Warrants                     0      
Private Placement                            
Stockholders Equity Note [Line Items]                            
Restricted shares granted to agent   1,111,111                        
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 9.00                        
Stock Issued During Period, Value, New Issues   $ 10,000,000                        
Preferred Stock, Liquidation Preference Per Share   $ 9.00                        
Stock Issued During Period, Shares, New Issues   1,111,111                        
Series B Warrants [Member]                            
Stockholders Equity Note [Line Items]                            
Proceeds from Issuance of Preferred Stock, Preference Stock, and Warrants, Total         $ 1,115,250                  
Warrant [Member] | Conversion Agreement [Member]                            
Stockholders Equity Note [Line Items]                            
Restricted shares granted to agent               325,000            
Stock Issued During Period, Shares, New Issues               325,000            
Maximum                            
Stockholders Equity Note [Line Items]                            
Expected term                     6 years      
Expected volatility rate                     136.04%      
Risk free interest rate                     1.06% 1.94%    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price                   $ 6.37 $ 6.00      
Minimum                            
Stockholders Equity Note [Line Items]                            
Expected term                     4 years 7 months 6 days      
Expected volatility rate                     126.42%      
Risk free interest rate                     0.75% 1.31%    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price                   $ 5.79 $ 4.50      
9% Senior Subordinated Convertible Notes due February 15, 2016                            
Stockholders Equity Note [Line Items]                            
Convertible notes, interest rate           9.00%         9.00%      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights                     82,500      
Debt Conversion, Converted Instrument, Shares Issued           138,463         138,463      
Interest Payable                     $ 554,000      
Debt Instrument, Convertible, Conversion Price                     $ 4.50      
Debt Instrument, Maturity Date           Feb. 15, 2016                
Debt Conversion, Original Debt, Amount           $ 553,851                
2010 Equity Incentive Plan                            
Stockholders Equity Note [Line Items]                            
Issuance of common stock for services (shares)                     500,000      
2012 Equity Incentive Plan                            
Stockholders Equity Note [Line Items]                            
Equity incentive plan, additional shares authorized for issuance                 9,000,000          
2013 Equity Incentive Plan                            
Stockholders Equity Note [Line Items]                            
Equity incentive plan, shares authorized for issuance                           500,000
2015 Equity Incentive Plan                            
Stockholders Equity Note [Line Items]                            
Equity incentive plan, shares authorized for issuance                     1,023,600   1,500,000  
MEZZANINE [Member] | Series A Preferred Stock [Member]                            
Stockholders Equity Note [Line Items]                            
Temporary Equity, Carrying Amount, Attributable to Parent                     $ 0 $ 7,077,778